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Excipient (pharmacologically inactive substance)

Medically reviewed by Last updated on June 22, 2020.

What is it?

Alpha-tocopherol, also known as vitamin E1, is one of several forms of vitamin E. It appears as a light yellow, viscous, odorless, oily liquid that deteriorates on exposure to light. Alpha-tocopherol is obtained from wheat germ oil or by synthesis, biologically exhibits the most vitamin E activity of the α-tocopherols, and is an antioxidant retarding rancidity by interfering with the autoxidation of fats.[1]

Vitamin E is found in foods such as vegetable oils and shortening, meat, eggs, milk, and leafy vegetables. Vitamin E is important for many processes in the body.

Vitamin E is used to treat Vitamin E deficiency. It is available as a liquid and as liquid-filled capsules. Vitamin E is a fat-soluble vitamin and can be toxic to the liver if it is taken in too high a dose.[2]

Top Medications with this excipient


[1] Alpha-tocopherol (Stedmans Medical Dictionary). Accessed 8/21/2012.

[2] Vitamin E. Accessed 8/21/2012.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.